A small plane crashes into Beijing's tallest skyscraper, the CITIC Tower (China Zun); the building is evacuated and emergency services seal roads and restrict access.Video circulating online shows debris, an intact tail lodged near a high floor and two broken glass panels on the facade, while municipal authorities have not issued an official statement.Police, fire and ambulance crews order deletion of images on social platforms, collect evidence at the scene and say the cause is under investigation.